/*!
 * jQuery UI Slider 1.8.22
 *
 * Copyright 2012, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Slider
 *
 * Depends:
 *    jquery.ui.core.js
 *    jquery.ui.mouse.js
 *    jquery.ui.widget.js
 */
(function( $, undefined ) {

// number of pages in a slider
// (how many times can you page up/down to go through the whole range)
var numPages = 5;

$.widget( "ui.slider", $.ui.mouse, {

    widgetEventPrefix: "slide",

    options: {
        animate: false,
        distance: 0,
        max: 100,
        min: 0,
        orientation: "horizontal",
        range: false,
        step: 1,
        value: 0,
        values: null
    },

    _create: function() {
        var self = this,
            o = this.options,
            existingHandles = this.element.find( ".ui-slider-handle" ).addClass( "ui-state-default ui-corner-all" ),
            handle = "<a class='ui-slider-handle ui-state-default ui-corner-all' href='#'></a>",
            handleCount = ( o.values && o.values.length ) || 1,
            handles = [];

        this._keySliding = false;
        this._mouseSliding = false;
        this._animateOff = true;
        this._handleIndex = null;
        this._detectOrientation();
        this._mouseInit();

        this.element
            .addClass( "ui-slider" +
                " ui-slider-" + this.orientation +
                " ui-widget" +
                " ui-widget-content" +
                " ui-corner-all" +
                ( o.disabled ? " ui-slider-disabled ui-disabled" : "" ) );

        this.range = $([]);

        if ( o.range ) {
            if ( o.range === true ) {
                if ( !o.values ) {
                    o.values = [ this._valueMin(), this._valueMin() ];
                }
                if ( o.values.length && o.values.length !== 2 ) {
                    o.values = [ o.values[0], o.values[0] ];
                }
            }

            this.range = $( "<div></div>" )
                .appendTo( this.element )
                .addClass( "ui-slider-range" +
                // note: this isn't the most fittingly semantic framework class for this element,
                // but worked best visually with a variety of themes
                " ui-widget-header" + 
                ( ( o.range === "min" || o.range === "max" ) ? " ui-slider-range-" + o.range : "" ) );
        }

        for ( var i = existingHandles.length; i < handleCount; i += 1 ) {
            handles.push( handle );
        }

        this.handles = existingHandles.add( $( handles.join( "" ) ).appendTo( self.element ) );

        this.handle = this.handles.eq( 0 );

        this.handles.add( this.range ).filter( "a" )
            .click(function( event ) {
                event.preventDefault();
            })
            .hover(function() {
                if ( !o.disabled ) {
                    $( this ).addClass( "ui-state-hover" );
                }
            }, function() {
                $( this ).removeClass( "ui-state-hover" );
            })
            .focus(function() {
                if ( !o.disabled ) {
                    $( ".ui-slider .ui-state-focus" ).removeClass( "ui-state-focus" );
                    $( this ).addClass( "ui-state-focus" );
                } else {
                    $( this ).blur();
                }
            })
            .blur(function() {
                $( this ).removeClass( "ui-state-focus" );
            });

        this.handles.each(function( i ) {
            $( this ).data( "index.ui-slider-handle", i );
        });

        this.handles
            .keydown(function( event ) {
                var index = $( this ).data( "index.ui-slider-handle" ),
                    allowed,
                    curVal,
                    newVal,
                    step;
    
                if ( self.options.disabled ) {
                    return;
                }
    
                switch ( event.keyCode ) {
                    case $.ui.keyCode.HOME:
                    case $.ui.keyCode.END:
                    case $.ui.keyCode.PAGE_UP:
                    case $.ui.keyCode.PAGE_DOWN:
                    case $.ui.keyCode.UP:
                    case $.ui.keyCode.RIGHT:
                    case $.ui.keyCode.DOWN:
                    case $.ui.keyCode.LEFT:
                        event.preventDefault();
                        if ( !self._keySliding ) {
                            self._keySliding = true;
                            $( this ).addClass( "ui-state-active" );
                            allowed = self._start( event, index );
                            if ( allowed === false ) {
                                return;
                            }
                        }
                        break;
                }
    
                step = self.options.step;
                if ( self.options.values && self.options.values.length ) {
                    curVal = newVal = self.values( index );
                } else {
                    curVal = newVal = self.value();
                }
    
                switch ( event.keyCode ) {
                    case $.ui.keyCode.HOME:
                        newVal = self._valueMin();
                        break;
                    case $.ui.keyCode.END:
                        newVal = self._valueMax();
                        break;
                    case $.ui.keyCode.PAGE_UP:
                        newVal = self._trimAlignValue( curVal + ( (self._valueMax() - self._valueMin()) / numPages ) );
                        break;
                    case $.ui.keyCode.PAGE_DOWN:
                        newVal = self._trimAlignValue( curVal - ( (self._valueMax() - self._valueMin()) / numPages ) );
                        break;
                    case $.ui.keyCode.UP:
                    case $.ui.keyCode.RIGHT:
                        if ( curVal === self._valueMax() ) {
                            return;
                        }
                        newVal = self._trimAlignValue( curVal + step );
                        break;
                    case $.ui.keyCode.DOWN:
                    case $.ui.keyCode.LEFT:
                        if ( curVal === self._valueMin() ) {
                            return;
                        }
                        newVal = self._trimAlignValue( curVal - step );
                        break;
                }
    
                self._slide( event, index, newVal );
            })
            .keyup(function( event ) {
                var index = $( this ).data( "index.ui-slider-handle" );
    
                if ( self._keySliding ) {
                    self._keySliding = false;
                    self._stop( event, index );
                    self._change( event, index );
                    $( this ).removeClass( "ui-state-active" );
                }
    
            });

        this._refreshValue();

        this._animateOff = false;
    },

    destroy: function() {
        this.handles.remove();
        this.range.remove();

        this.element
            .removeClass( "ui-slider" +
                " ui-slider-horizontal" +
                " ui-slider-vertical" +
                " ui-slider-disabled" +
                " ui-widget" +
                " ui-widget-content" +
                " ui-corner-all" )
            .removeData( "slider" )
            .unbind( ".slider" );

        this._mouseDestroy();

        return this;
    },

    _mouseCapture: function( event ) {
        var o = this.options,
            position,
            normValue,
            distance,
            closestHandle,
            self,
            index,
            allowed,
            offset,
            mouseOverHandle;

        if ( o.disabled ) {
            return false;
        }

        this.elementSize = {
            width: this.element.outerWidth(),
            height: this.element.outerHeight()
        };
        this.elementOffset = this.element.offset();

        position = { x: event.pageX, y: event.pageY };
        normValue = this._normValueFromMouse( position );
        distance = this._valueMax() - this._valueMin() + 1;
        self = this;
        this.handles.each(function( i ) {
            var thisDistance = Math.abs( normValue - self.values(i) );
            if ( distance > thisDistance ) {
                distance = thisDistance;
                closestHandle = $( this );
                index = i;
            }
        });

        // workaround for bug #3736 (if both handles of a range are at 0,
        // the first is always used as the one with least distance,
        // and moving it is obviously prevented by preventing negative ranges)
        if( o.range === true && this.values(1) === o.min ) {
            index += 1;
            closestHandle = $( this.handles[index] );
        }

        allowed = this._start( event, index );
        if ( allowed === false ) {
            return false;
        }
        this._mouseSliding = true;

        self._handleIndex = index;

        closestHandle
            .addClass( "ui-state-active" )
            .focus();
        
        offset = closestHandle.offset();
        mouseOverHandle = !$( event.target ).parents().andSelf().is( ".ui-slider-handle" );
        this._clickOffset = mouseOverHandle ? { left: 0, top: 0 } : {
            left: event.pageX - offset.left - ( closestHandle.width() / 2 ),
            top: event.pageY - offset.top -
                ( closestHandle.height() / 2 ) -
                ( parseInt( closestHandle.css("borderTopWidth"), 10 ) || 0 ) -
                ( parseInt( closestHandle.css("borderBottomWidth"), 10 ) || 0) +
                ( parseInt( closestHandle.css("marginTop"), 10 ) || 0)
        };

        if ( !this.handles.hasClass( "ui-state-hover" ) ) {
            this._slide( event, index, normValue );
        }
        this._animateOff = true;
        return true;
    },

    _mouseStart: function( event ) {
        return true;
    },

    _mouseDrag: function( event ) {
        var position = { x: event.pageX, y: event.pageY },
            normValue = this._normValueFromMouse( position );
        
        this._slide( event, this._handleIndex, normValue );

        return false;
    },

    _mouseStop: function( event ) {
        this.handles.removeClass( "ui-state-active" );
        this._mouseSliding = false;

        this._stop( event, this._handleIndex );
        this._change( event, this._handleIndex );

        this._handleIndex = null;
        this._clickOffset = null;
        this._animateOff = false;

        return false;
    },
    
    _detectOrientation: function() {
        this.orientation = ( this.options.orientation === "vertical" ) ? "vertical" : "horizontal";
    },

    _normValueFromMouse: function( position ) {
        var pixelTotal,
            pixelMouse,
            percentMouse,
            valueTotal,
            valueMouse;

        if ( this.orientation === "horizontal" ) {
            pixelTotal = this.elementSize.width;
            pixelMouse = position.x - this.elementOffset.left - ( this._clickOffset ? this._clickOffset.left : 0 );
        } else {
            pixelTotal = this.elementSize.height;
            pixelMouse = position.y - this.elementOffset.top - ( this._clickOffset ? this._clickOffset.top : 0 );
        }

        percentMouse = ( pixelMouse / pixelTotal );
        if ( percentMouse > 1 ) {
            percentMouse = 1;
        }
        if ( percentMouse < 0 ) {
            percentMouse = 0;
        }
        if ( this.orientation === "vertical" ) {
            percentMouse = 1 - percentMouse;
        }

        valueTotal = this._valueMax() - this._valueMin();
        valueMouse = this._valueMin() + percentMouse * valueTotal;

        return this._trimAlignValue( valueMouse );
    },

    _start: function( event, index ) {
        var uiHash = {
            handle: this.handles[ index ],
            value: this.value()
        };
        if ( this.options.values && this.options.values.length ) {
            uiHash.value = this.values( index );
            uiHash.values = this.values();
        }
        return this._trigger( "start", event, uiHash );
    },

    _slide: function( event, index, newVal ) {
        var otherVal,
            newValues,
            allowed;

        if ( this.options.values && this.options.values.length ) {
            otherVal = this.values( index ? 0 : 1 );

            if ( ( this.options.values.length === 2 && this.options.range === true ) && 
                    ( ( index === 0 && newVal > otherVal) || ( index === 1 && newVal < otherVal ) )
                ) {
                newVal = otherVal;
            }

            if ( newVal !== this.values( index ) ) {
                newValues = this.values();
                newValues[ index ] = newVal;
                // A slide can be canceled by returning false from the slide callback
                allowed = this._trigger( "slide", event, {
                    handle: this.handles[ index ],
                    value: newVal,
                    values: newValues
                } );
                otherVal = this.values( index ? 0 : 1 );
                if ( allowed !== false ) {
                    this.values( index, newVal, true );
                }
            }
        } else {
            if ( newVal !== this.value() ) {
                // A slide can be canceled by returning false from the slide callback
                allowed = this._trigger( "slide", event, {
                    handle: this.handles[ index ],
                    value: newVal
                } );
                if ( allowed !== false ) {
                    this.value( newVal );
                }
            }
        }
    },

    _stop: function( event, index ) {
        var uiHash = {
            handle: this.handles[ index ],
            value: this.value()
        };
        if ( this.options.values && this.options.values.length ) {
            uiHash.value = this.values( index );
            uiHash.values = this.values();
        }

        this._trigger( "stop", event, uiHash );
    },

    _change: function( event, index ) {
        if ( !this._keySliding && !this._mouseSliding ) {
            var uiHash = {
                handle: this.handles[ index ],
                value: this.value()
            };
            if ( this.options.values && this.options.values.length ) {
                uiHash.value = this.values( index );
                uiHash.values = this.values();
            }

            this._trigger( "change", event, uiHash );
        }
    },

    value: function( newValue ) {
        if ( arguments.length ) {
            this.options.value = this._trimAlignValue( newValue );
            this._refreshValue();
            this._change( null, 0 );
            return;
        }

        return this._value();
    },

    values: function( index, newValue ) {
        var vals,
            newValues,
            i;

        if ( arguments.length > 1 ) {
            this.options.values[ index ] = this._trimAlignValue( newValue );
            this._refreshValue();
            this._change( null, index );
            return;
        }

        if ( arguments.length ) {
            if ( $.isArray( arguments[ 0 ] ) ) {
                vals = this.options.values;
                newValues = arguments[ 0 ];
                for ( i = 0; i < vals.length; i += 1 ) {
                    vals[ i ] = this._trimAlignValue( newValues[ i ] );
                    this._change( null, i );
                }
                this._refreshValue();
            } else {
                if ( this.options.values && this.options.values.length ) {
                    return this._values( index );
                } else {
                    return this.value();
                }
            }
        } else {
            return this._values();
        }
    },

    _setOption: function( key, value ) {
        var i,
            valsLength = 0;

        if ( $.isArray( this.options.values ) ) {
            valsLength = this.options.values.length;
        }

        $.Widget.prototype._setOption.apply( this, arguments );

        switch ( key ) {
            case "disabled":
                if ( value ) {
                    this.handles.filter( ".ui-state-focus" ).blur();
                    this.handles.removeClass( "ui-state-hover" );
                    this.handles.propAttr( "disabled", true );
                    this.element.addClass( "ui-disabled" );
                } else {
                    this.handles.propAttr( "disabled", false );
                    this.element.removeClass( "ui-disabled" );
                }
                break;
            case "orientation":
                this._detectOrientation();
                this.element
                    .removeClass( "ui-slider-horizontal ui-slider-vertical" )
                    .addClass( "ui-slider-" + this.orientation );
                this._refreshValue();
                break;
            case "value":
                this._animateOff = true;
                this._refreshValue();
                this._change( null, 0 );
                this._animateOff = false;
                break;
            case "values":
                this._animateOff = true;
                this._refreshValue();
                for ( i = 0; i < valsLength; i += 1 ) {
                    this._change( null, i );
                }
                this._animateOff = false;
                break;
        }
    },

    //internal value getter
    // _value() returns value trimmed by min and max, aligned by step
    _value: function() {
        var val = this.options.value;
        val = this._trimAlignValue( val );

        return val;
    },

    //internal values getter
    // _values() returns array of values trimmed by min and max, aligned by step
    // _values( index ) returns single value trimmed by min and max, aligned by step
    _values: function( index ) {
        var val,
            vals,
            i;

        if ( arguments.length ) {
            val = this.options.values[ index ];
            val = this._trimAlignValue( val );

            return val;
        } else {
            // .slice() creates a copy of the array
            // this copy gets trimmed by min and max and then returned
            vals = this.options.values.slice();
            for ( i = 0; i < vals.length; i+= 1) {
                vals[ i ] = this._trimAlignValue( vals[ i ] );
            }

            return vals;
        }
    },
    
    // returns the step-aligned value that val is closest to, between (inclusive) min and max
    _trimAlignValue: function( val ) {
        if ( val <= this._valueMin() ) {
            return this._valueMin();
        }
        if ( val >= this._valueMax() ) {
            return this._valueMax();
        }
        var step = ( this.options.step > 0 ) ? this.options.step : 1,
            valModStep = (val - this._valueMin()) % step,
            alignValue = val - valModStep;

        if ( Math.abs(valModStep) * 2 >= step ) {
            alignValue += ( valModStep > 0 ) ? step : ( -step );
        }

        // Since JavaScript has problems with large floats, round
        // the final value to 5 digits after the decimal point (see #4124)
        return parseFloat( alignValue.toFixed(5) );
    },

    _valueMin: function() {
        return this.options.min;
    },

    _valueMax: function() {
        return this.options.max;
    },
    
    _refreshValue: function() {
        var oRange = this.options.range,
            o = this.options,
            self = this,
            animate = ( !this._animateOff ) ? o.animate : false,
            valPercent,
            _set = {},
            lastValPercent,
            value,
            valueMin,
            valueMax;

        if ( this.options.values && this.options.values.length ) {
            this.handles.each(function( i, j ) {
                valPercent = ( self.values(i) - self._valueMin() ) / ( self._valueMax() - self._valueMin() ) * 100;
                _set[ self.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
                $( this ).stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );
                if ( self.options.range === true ) {
                    if ( self.orientation === "horizontal" ) {
                        if ( i === 0 ) {
                            self.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { left: valPercent + "%" }, o.animate );
                        }
                        if ( i === 1 ) {
                            self.range[ animate ? "animate" : "css" ]( { width: ( valPercent - lastValPercent ) + "%" }, { queue: false, duration: o.animate } );
                        }
                    } else {
                        if ( i === 0 ) {
                            self.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { bottom: ( valPercent ) + "%" }, o.animate );
                        }
                        if ( i === 1 ) {
                            self.range[ animate ? "animate" : "css" ]( { height: ( valPercent - lastValPercent ) + "%" }, { queue: false, duration: o.animate } );
                        }
                    }
                }
                lastValPercent = valPercent;
            });
        } else {
            value = this.value();
            valueMin = this._valueMin();
            valueMax = this._valueMax();
            valPercent = ( valueMax !== valueMin ) ?
                    ( value - valueMin ) / ( valueMax - valueMin ) * 100 :
                    0;
            _set[ self.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
            this.handle.stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );

            if ( oRange === "min" && this.orientation === "horizontal" ) {
                this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { width: valPercent + "%" }, o.animate );
            }
            if ( oRange === "max" && this.orientation === "horizontal" ) {
                this.range[ animate ? "animate" : "css" ]( { width: ( 100 - valPercent ) + "%" }, { queue: false, duration: o.animate } );
            }
            if ( oRange === "min" && this.orientation === "vertical" ) {
                this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( { height: valPercent + "%" }, o.animate );
            }
            if ( oRange === "max" && this.orientation === "vertical" ) {
                this.range[ animate ? "animate" : "css" ]( { height: ( 100 - valPercent ) + "%" }, { queue: false, duration: o.animate } );
            }
        }
    }

});

$.extend( $.ui.slider, {
    version: "1.8.22"
});

}(jQuery));
